With the huge development of smart terminal market, research on lightweight SISR models has gained increasing attention. Although existing lightweight SISR models have achieved a good balance between model size and performance, we find that they still cannot be used in edge devices (e.g., smartphones, smart cameras). This is because the model size and computational costs of these models are still exceed the limits of edge devices.
Therefore, exploring lightweight SISR models that can be practical in use for the edge devices has great research significance and commercial value. To achieve this, more efficient network structure and mechanisms are worthy of further exploration. Moreover, it is also necessary to use technologies like network binarization [1]} and network quantization [2]} to further reduce the model size. In the future, it is worth combining the lightweight SISR models with model compression schemes to achieve the usage of SISR on edge devices.
